DS1644-120+ Maxim Integrated Products, DS1644-120+ Datasheet - Page 14

• Manufacturer Part Number: DS1644-120+
• Description: IC RAM TIMEKEEP NV 120NS 28-EDIP
• Manufacturer: Maxim Integrated Products
• Type: Clock/Calendar/NVSRAMr

Specifications of DS1644-120+

• Memory Size: 256K (32K x 8)
• Time Format: HH:MM:SS (24 hr)
• Date Format: YY-MM-DD-dd
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 28-DIP Module (600 mil), 28-EDIP
• Function: Clock/Calendar/NV Timekeeping RAM
• Rtc Memory Size: 32768 Byte
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.5 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: Through Hole
• Rtc Bus Interface: Parallel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

REVISION HISTORY
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim
reserves the right to change the circuitry and specifications without notice at any time.
M a x i m I n t e g r a t e d P r o d u c t s , 1 2 0 S a n G a b r i e l D r i v e , S u n n y v a l e , C A 9 4 0 8 6 4 0 8 - 7 3 7 - 7 6 0 0
© 2010 Maxim Integrated Products
REVISION
DATE
4/10
Removed the leaded parts from the Ordering Information table; moved the
Operating Range table into the Absolute Maximum Ratings section, added
the lead temperature, and changed the soldering temperature information.
DESCRIPTION
Maxim and the Dallas logo are registered trademarks of Maxim Integrated Products, Inc.
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